Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0082—Side bar locking
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B19/00—Keys; Accessories therefor
  • E05B19/0017—Key profiles
  • E05B19/0041—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
  • E05B19/007—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key with U- or V-shaped cross-section
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/0078—Asymmetrical tumbler pins, e.g. with a key operating on a radial protrusion of a tumbler pin
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
  • E05B27/10—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by other surfaces of the key, e.g. openings receiving projections on the tumblers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T70/00—Locks
  • Y10T70/70—Operating mechanism
  • Y10T70/7441—Key
  • Y10T70/7486—Single key
  • Y10T70/7508—Tumbler type
  • Y10T70/7559—Cylinder type
  • Y10T70/7565—Plural tumbler sets
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T70/00—Locks
  • Y10T70/70—Operating mechanism
  • Y10T70/7441—Key
  • Y10T70/7486—Single key
  • Y10T70/7508—Tumbler type
  • Y10T70/7559—Cylinder type
  • Y10T70/7588—Rotary plug
  • Y10T70/7593—Sliding tumblers
  • Y10T70/7599—Transverse of plug
  • Y10T70/7616—Including sidebar
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T70/00—Locks
  • Y10T70/70—Operating mechanism
  • Y10T70/7441—Key
  • Y10T70/7915—Tampering prevention or attack defeating
  • Y10T70/7932—Anti-pick

Definitions

• the invention relates generally to cylinder lock systems of the kind described in the international patent application No. PCT/SE87/00038 (WO87/04749), i.e. systems including a cylinder lock comprising:
• each tumbler including a body part guided for elevational movement in an associated transverse cavity in said key plug and a finger projecting transversally outwardly from said body part so as to extend into said key slot and engage with said code pattern of a properly shaped key blade being inserted into the key slot; said locking tumblers being blockingly associated with the cylinder shell either directly or indirectly by means of a fence member so that elevational positioning of said locking tumblers with said properly shaped key blade enables clearence of the shear line.
• the lock known from the above-mentioned international application has the special feature of a pivotable finger on each locking tumbler, so that the finger causes the respective tumbler to be specifically rotated when a properly shaped key is being inserted into the lock.
• this feature makes the lock and the key blade relatively complicated and expensive.
• the object of the present invention is to provide a cylinder lock and key system which is somewhat easier and less expensive to manufacture while retaining the most important advantages of the previously known system.
• the inventive concept also includes a cylinder lock and key blade combination system with a master key, as defined in claim 7, and a locking tumbler for use with a cylinder lock, as defined in claim 8.
• Fig. 1 illustrates a key blade in a perspective view
• Fig. 2a is a transverse section along line II-II in Fig.l;
• Fig. 2b is a similar section through a slightly modified key blade
• Fig. 3 illustrates a lock according to the invention to be used in combination with the key blade of Fig. 1, a part of the lock being broken away to show the inside thereof;
• Fig. 4 shows, in a larger scale, a partial section through the key plug of the lock of Fig. 3;
• Fig. 5 shows a locking tumbler blank in perspective view
• Figs. 6a - 6c show, likewise in perspective views, three different locking tumblers made from a blank as shown in Fig. 5:
• Figs, 6d and 6e show a locking tumbler in side and front views, respectively;
• Figs. 7a - 7c show schematically three different locking tumblers in side views
• Figs. 8a - 8c show, in perspective views, three different locking tumblers of a modified kind.
• Figs. 9a - 9c show, in side views and in a larger scale, three different key blades cooperating with locking locking tumblers as shown in Figs. 6a - 6c, including a master key blade (Fig. 9c).
• the key blade 1 shown in Fig. 1 has a longitudinal axis A of insertion and is insertable into the lock shown in Fig. 3.
• the key blade is generally flat with substantially planar side surfaces 2 and 3.
• the side surface 2 to the left in Fig. 2a has a minor step 4, and the side surface to the right in Fig. 2a has a longitudinal groove 5 with an upper side wall 6 inclined so as to face away from the blade 1 and a lower side wall 7 oriented substantially at right angle to the central plane P of the blade.
• the lower edge surface 8 is slightly curved.
• the longitudinal groove 5' has two mutually parallel side walls 6' and 7 oriented at right angle to the central plane P. It will be apparent from Figures 1, 2a and 3 that the key blade 1 has a cross-sectional shape fitting into the key slot 9 of the lock. With a slight modification of the ridge 10 at the right hand side wall of the key slot 9, the modified key blade 1' of Fig. 2b will also fit into the lock.
• the lock 11 is of the rotary type and comprises a cylinder shell 12 and a key plug 13 rotationally mounted in the shell 12 to provide a shear line between the shell 12 and the plug 13 in parallel to the rotational axis thereof for receiving the key blade 1.
• the lock 11 includes two rows 14,15 of locking tumblers or pins located in two mutually parallel planes.
• a first row 14 of six locking pins is centrally located substantially in the central plane of the key slot 9 so as to cooperate with the upper edge portion 16 of the key blade 1, as described in the above-mentioned international application No. PCT/SE87/00038.
• a second row 15 of five locking tumblers or pins 15a - 15e is laterally offset (to the right in Fig. 3).
• each locking pin 15a - 15e is totally confined with the key plug 13 in a corresponding, cylindrical cavity or bore 17a - 17e, respectively (compare also Fig. 4).
• the locking tumblers 15a - 15e in the second row are non-rotatably guided in the respective bores 17a - 17e and are each provided with a finger 18a - 18e, which projects transversally outwardly in a specific position into the key slot 9.
• the locking tumblers 15a - 15e are only movable elevationally, and upon a specific elevational positioning of each such locking tumbler by means of a properly shaped key blade 1, a common fence member or side bar 19 will be allowed to engage into recesses 20a - 20e formed in the cylindrical surfaces of the body parts 21a - 21e of the tumblers and to be displaced transversally into its inward, seated position in the slot 22 of the key plug 13, thus clearing the shear line and releasing the lock.
• the locking tumblers may engage directly with the cylinder shell (e.g. in the same manner as the locking tumblers of the first row 14).
• Each locking tumbler 15a - 15e includes a substantially cylindrical body part 21a - 21e and a finger 18a - 18e with a relatively wide base portion 23a - 23e and a relatively narrow, substantially cylindrical free end portion 24a - 24e, as illustrated by the three different tumblers 15a, 15b, 15c shown in Fig. 6b, Fig. 6c and Figs. 6a,6d,6e, respectively.
• the three different tumblers are all made from a similar tumbler blank 15' having a substantially cylindrical body part 21' and a likewise cylindrical or disc-like finger blank part 18', from which the material is cut out so as to form the desired finger end portion located centrally (24c, Fig.6a), to the left as seen in Fig. 6b (24a) or to the right as seen in Fig. 6c (24b). Compare also Fig. 6e.
• the part-cylindrical base portion 23a, 23b, 23c, etc. of each finger is guided for elevational movement in a corresponding part-cylindrical bore 25a, 25b, 25c, etc. located adjacent and parallel to the respective bore 17a, 17b, 17c, etc. so as to be open transversally to the key slot 9 into which the respective finger end portion 24a, 24b, 24c, etc. extends for making contact with an inserted key blade.
• the finger end portions 24a, 24b, 24c, etc. will be distributed in a specific, irregular pattern along the key slot 9, which pattern is generally different from the (normally uniform) longitudinal distribution of the finger body parts 21a, 21b, 21c, etc. in the longitudinal direction (in parallel to the key slot 9 and the axis A of insertion of the key blade).
• the finger end portions 24a, 24b, 24c etc. make contact with the lower side wall 7 of the groove 5 provided in the side surface 3 of the key blade.
• the side wall 7 there is formed an elongated, longitudinally extending wave-like code pattern surface, against which the finger end portions are urged downwards by means of compressive springs 26a - 26e (see Fig. 3) acting on the upper portion of the respective body part 2ia, 21b, 2ic, etc.
• the opposite side wall 6' may be formed, e.g. by means of a cutter pin, with an identical configuration as the lower side wall code pattern surface 7 , in which case the respective finger free end portion 24a, 24b, 24c, etc.
• the tumblers 15a - 15e will then be positively guided by the wave-like key groove so as to reciprocate elevationally in response to the wave-like groove pattern when the key blade 1' is being inserted into the key lock.
• the one-sided or two-sided guiding surface (7 or 6', 7, respectively) or the key groove 5,5' is rather easy to make, e.g. by means of a cutter pin in one step, since the guiding surface can preferably be perpendicular to the side surface 3 (and the groove bottom surface) of the key blade along the whole length thereof.
• the rest position of the respective finger end portion does not have to be located in a concavity location (as was necessary in the lock and key system described in the above-mentioned international application) but may be situated at any well-defined, preferably substantially horizontal portion of the code pattern surface.
• Figs. 7a, 7b, 7c there is illustrated how the recesses 20', 20" and 20"' may be distributed elevationally in the body part 21 of the respective tumbler, wherein the recess 20' (Fig. 7a) can accomodate the side bar 19 in either one of two elevational positions (H2, H3), as can the recess 20"' (Fig. 7c, H1,H2), whereas the recess 20" (Fig. 7b) requires the side bar to be in position H2.
• the recess 20' Fig. 7a
• Fig. 7c Fig. 7c, H1,H2
• the recess 20" Fig. 7b
• such elevationally distributed recesses of different height can be used to establish a master key system (another possibility will be explained below with reference to Figs. 9a, 9b, 9c).
• An essential feature of the present invention is that the free end portions of the locking tumbler fingers are located in specific, predetermined positions. In principle, this can be achieved with fingers each extending at a specific angle from the central axis of the tumbler body part. Another possible embodiment is illustrated in Figs.
• tumblers 15'a, 15'b and 15'c have fingers including a relatively wide base portion 23'a, 23'b, 23'c, which is guided in a corresponding recess adjacent to the bore housing the body part 2i'a, 21'b, 21'c of the tumbler and thus prevents rotation of the tumbler, and a relatively narrow free end portion 24'a, 24'b, 24'c, each having a substantially triangular cross section with one rounded corner portion 27'a, 27'b, 27'c constituting a specifically located (to the left, centrally, or to the right as shown) bearing surface adapted to make contact with the code pattern of the key blade.
• the predetermined, irregular longitudinal distribution pattern of the finger free end portions will also provide an advantageous possibility of establishing a master key system, as illustrated in Figs. 9a, 9b, 9c.
• the relatively simple groove code patterns of the key blades 1' and 1" are specifically configurated to correspond to one specific lock only (having the fingers 18'a - 18'e and 18"a - 18"e, respectively), whereas the more complex groove code pattern of the master key blade 1"' (Fig. 9c) includes all the critical code pattern portions of the key blades 1' and 1" so as to match the predetermined finger positions of both locks. It will be understood that this principle can be applied in combination with differently located recesses in the body portions of the tumblers to provide a sophisticated master key system.

Landscapes

• Lock And Its Accessories (AREA)
• Toys (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Hydraulic Control Valves For Brake Systems (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Pens And Brushes (AREA)
• Hydrogenated Pyridines (AREA)
• Medicines Containing Plant Substances (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
• Chairs Characterized By Structure (AREA)
• Fluid-Damping Devices (AREA)
• Steroid Compounds (AREA)

Priority Applications (12)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20370996

Family Applications (1)

Country Status (11)

Cited By (8)

Families Citing this family (32)

Citations (4)

Family Cites Families (9)

• 1988
  • 1988-01-20 WO PCT/SE1988/000015 patent/WO1989006733A1/en active IP Right Grant
  • 1988-01-20 US US07/536,671 patent/US5067335A/en not_active Expired - Lifetime
  • 1988-01-20 AT AT88901942T patent/ATE88236T1/de not_active IP Right Cessation
  • 1988-01-20 EP EP88901942A patent/EP0395632B1/en not_active Expired - Lifetime
  • 1988-01-20 AU AU13901/88A patent/AU613020B2/en not_active Expired
  • 1988-01-20 DE DE8888901942T patent/DE3880326T2/de not_active Expired - Lifetime
  • 1988-01-20 JP JP63502065A patent/JP2612201B2/ja not_active Expired - Lifetime
• 1990
  • 1990-07-18 DK DK172290A patent/DK171383B1/da not_active IP Right Cessation
  • 1990-07-19 RU SU904830633A patent/RU1838557C/ru active
  • 1990-07-20 FI FI903679A patent/FI89964C/fi not_active IP Right Cessation
• 1998
  • 1998-03-26 HK HK98102573A patent/HK1003483A1/xx not_active IP Right Cessation

Patent Citations (4)

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